Inc means you do 2 stitches in the stitch or space indicated.It can also be written as 2 Sc. If the pattern tells you to Inc 5, you should work 2 Sc stitches in each of the the next 5 stitches for a total of 10 stitches in the round.

Hi! I am trying out your pattern and it is super cute ;) Thanks! I have some questions while making it. On round 18, you wrote Inc 5, Sc 5 (total of 15 sts). Won't it make one side of the round wider than the other (as in round 19, 20 and 22, too)? If that's so, which side should that be? The front or the back of the hippo should be wider?